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单选题
Britain_________ for control of the sea in the 17th century.
A
contended
B
contrived
C
contented
D
confined
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单选题The radar control used to reduce sea return at close ranges is the（）.A
gain controlB
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单选题The radar control that reduces weak echoes out to a limited distance from the ship is the（）.A
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单选题水手在船首进行了望。（）A
Sailors keep uplook at sea.B
Sailors keep outlook at sea.C
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单选题When you turn on the fast time constant (differentiator) control of a radar it will（）.A
enhance weak target echoes and brighten them on the PPIB
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reduce the beam width to provide a map-like presentation for navigation
考题
单选题The fresh water generator produces fresh water （）.A
by cooling sea waterB
by heating sea waterC
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单选题Moving of an anchor over the sea bottom to control the movement of the vessel defines（）.A
dredging ( of anchor )B
dragging ( of anchor )C
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填空题The term "（）" is commonly used to name the work of the 17th - century writers who wrote under the influence of John Donne.
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单选题In the 17th century,the English government encouraged people from Scotland and Northern England to emigrate to the north of Ireland because（）A
they wanted to increase its control over IrelandB
they had too many people and didn’t have enough space for them to live in BritainC
they intended to expand their investmentD
they believed that Ireland was the best place for them
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单选题Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from（）.A
low steel on the Huey P. Long BridgeB
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单选题If a heavy sea strikes the rudder, the shock is transmitted through （） to the rams, this cause a sudden increase in oil pressure in one of the cylinders.A
the control rodB
the hunting gearC
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单选题What must be carried out in order to launch and inflate an inflatable liferaft? （）A
Pull on the hydrostatic release，pull on the sea painterB
Push on the hydrostatic release，pull on the sea painterC
Push on the hydrostatic release，push on the sea painterD
Pull on the hydrostatic release，push on the sea painter
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HA ModeB
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Control ChannelD
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welcomeB
admitted in some special sea areasC
prohibitedD
acceptable
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单选题A fire in a ballast pumproom can be brought under control with minimal impact on stability by（）.A
cooling the outside bulkheads with waterB
shutting all sources of air into the compartmentC
closing the sea chestD
flooding the compartment with salt water
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